2 Copyright (C) 2012 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 #include <glib/gstdio.h>
33 #include <glibmm/miscutils.h>
34 #include <glibmm/fileutils.h>
36 #include "ardour/linux_vst_support.h"
37 #include "pbd/basename.h"
38 #include "pbd/error.h"
42 /***********************************************************/
43 /* VSTFX - A set of modules for managing linux VST plugins */
44 /* vstfx.cc, vstfxwin.cc and vstfxinfofile.cc */
45 /***********************************************************/
47 /*Simple error handler stuff for VSTFX*/
49 void vstfx_error (const char *fmt, ...)
55 vsnprintf (buffer, sizeof(buffer), fmt, ap);
56 vstfx_error_callback (buffer);
60 /*default error handler callback*/
62 void default_vstfx_error_callback (const char *desc)
64 PBD::error << desc << endmsg;
67 void (*vstfx_error_callback)(const char *desc) = &default_vstfx_error_callback;
71 /*Create and return a pointer to a new VSTFX handle*/
76 VSTHandle* vstfx = (VSTHandle *) calloc (1, sizeof (VSTHandle));
80 /*Create and return a pointer to a new vstfx instance*/
85 VSTState* vstfx = (VSTState *) calloc (1, sizeof (VSTState));
89 pthread_mutex_init (&vstfx->lock, 0);
90 pthread_cond_init (&vstfx->window_status_change, 0);
91 pthread_cond_init (&vstfx->plugin_dispatcher_called, 0);
92 pthread_cond_init (&vstfx->window_created, 0);
96 vstfx->want_program = -1;
97 vstfx->want_chunk = 0;
98 vstfx->n_pending_keys = 0;
99 vstfx->has_editor = 0;
100 vstfx->program_set_without_editor = 0;
101 vstfx->linux_window = 0;
102 vstfx->linux_plugin_ui_window = 0;
103 vstfx->eventProc = 0;
104 vstfx->extra_data = 0;
105 vstfx->want_resize = 0;
110 /*This loads the plugin shared library*/
112 void* vstfx_load_vst_library(const char* path)
121 /*Try and load the shared library pointed to by the path -
122 NOTE: You have to give RTLD_LAZY or RTLD_NOW to dlopen or
123 you get some occasional failures to load - dlerror reports
126 if ((dll = dlopen (path, RTLD_LOCAL | RTLD_LAZY)) != 0) {
130 if (Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
131 PBD::error << string_compose (_("Could not open existing LXVST plugin: %1"), dlerror()) << endmsg;
135 /*We didn't find the library so try and get the path specified in the
136 env variable LXVST_PATH*/
138 envdup = getenv ("LXVST_PATH");
140 /*Path not specified - not much more we can do*/
145 /*Copy the path into envdup*/
147 envdup = strdup (envdup);
154 /*Try all the possibilities in the path - deliminated by : */
156 lxvst_path = strtok (envdup, ":");
158 while (lxvst_path != 0)
160 vstfx_error ("\"%s\"", lxvst_path);
161 len1 = strlen(lxvst_path);
163 full_path = (char*)malloc(len1 + 1 + len2 + 1);
164 memcpy(full_path, lxvst_path, len1);
165 full_path[len1] = '/';
166 memcpy(full_path + len1 + 1, path, len2);
167 full_path[len1 + 1 + len2] = '\0';
169 /*Try and load the library*/
171 if ((dll = dlopen(full_path, RTLD_LOCAL | RTLD_LAZY)) != 0)
179 lxvst_path = strtok (0, ":");
189 /*This loads up a plugin, given the path to its .so file and
190 finds its main entry point etc*/
193 vstfx_load (const char *path)
198 /*Create a new handle we can use to reference the plugin*/
200 fhandle = vstfx_handle_new();
202 /*See if we have .so appended to the path - if not we need to make sure it is added*/
204 if (strstr (path, ".so") == 0)
207 /*Append the .so to the path - Make sure the path has enough space*/
209 buf = (char *)malloc(strlen(path) + 4); //The .so and a terminating zero
211 sprintf (buf, "%s.so", path);
213 fhandle->nameptr = strdup (path);
218 /*We already have .so appened to the filename*/
222 fhandle->nameptr = strdup (path);
225 /* get a name for the plugin based on the path: ye old VST problem where
226 we don't know anything about its name until we load and instantiate the plugin
227 which we don't want to do at this point
230 fhandle->name = strdup (PBD::basename_nosuffix (fhandle->nameptr).c_str());
232 /*call load_vstfx_library to actually load the .so into memory*/
234 if ((fhandle->dll = vstfx_load_vst_library (buf)) == 0)
236 vstfx_unload (fhandle);
243 /*Find the main entry point into the plugin*/
245 if ((fhandle->main_entry = (main_entry_t) dlsym(fhandle->dll, "main")) == 0 &&
246 (fhandle->main_entry = (main_entry_t) dlsym(fhandle->dll, "VSTPluginMain")) == 0
249 /*If it can't be found, unload the plugin and return a 0 handle*/
251 vstfx_unload (fhandle);
260 /*return the handle of the plugin*/
265 /*This unloads a plugin*/
268 vstfx_unload (VSTHandle* fhandle)
270 if (fhandle->plugincnt)
272 /*Still have plugin instances - can't unload the library
273 - actually dlclose keeps an instance count anyway*/
278 /*Valid plugin loaded?*/
282 dlclose(fhandle->dll);
286 if (fhandle->nameptr)
288 free (fhandle->nameptr);
289 free (fhandle->name);
292 /*Don't need the plugin handle any more*/
298 /*This instantiates a plugin*/
301 vstfx_instantiate (VSTHandle* fhandle, audioMasterCallback amc, void* userptr)
303 VSTState* vstfx = vstfx_new ();
307 vstfx_error( "** ERROR ** VSTFX : The handle was 0\n" );
311 if ((vstfx->plugin = fhandle->main_entry (amc)) == 0)
313 vstfx_error ("** ERROR ** VSTFX : %s could not be instantiated :(\n", fhandle->name);
318 vstfx->handle = fhandle;
319 vstfx->plugin->user = userptr;
321 if (vstfx->plugin->magic != kEffectMagic)
323 vstfx_error ("** ERROR ** VSTFX : %s is not a VST plugin\n", fhandle->name);
328 vstfx->plugin->dispatcher (vstfx->plugin, effOpen, 0, 0, 0, 0);
330 /*May or May not need to 'switch the plugin on' here - unlikely
331 since FST doesn't and most plugins start up 'On' by default - I think this is the least of our worries*/
333 //vstfx->plugin->dispatcher (vstfx->plugin, effMainsChanged, 0, 1, 0, 0);
335 vstfx->vst_version = vstfx->plugin->dispatcher (vstfx->plugin, effGetVstVersion, 0, 0, 0, 0);
337 vstfx->handle->plugincnt++;
343 /*Close a vstfx instance*/
345 void vstfx_close (VSTState* vstfx)
347 vstfx_destroy_editor(vstfx);
351 vstfx->plugin->dispatcher (vstfx->plugin, effMainsChanged, 0, 0, 0, 0);
353 /*Calling dispatcher with effClose will cause the plugin's destructor to
354 be called, which will also remove the editor if it exists*/
356 vstfx->plugin->dispatcher (vstfx->plugin, effClose, 0, 0, 0, 0);
359 if (vstfx->handle->plugincnt)
360 vstfx->handle->plugincnt--;
362 /*vstfx_unload will unload the dll if the instance count allows -
363 we need to do this because some plugins keep their own instance count
364 and (JUCE) manages the plugin UI in its own thread. When the plugins
365 internal instance count reaches zero, JUCE stops the UI thread and won't
366 restart it until the next time the library is loaded. If we don't unload
367 the lib JUCE will never restart*/
370 if (vstfx->handle->plugincnt)
375 /*Valid plugin loaded - so we can unload it and 0 the pointer
376 to it. We can't free the handle here because we don't know what else
377 might need it. It should be / is freed when the plugin is deleted*/
379 if (vstfx->handle->dll)
381 dlclose(vstfx->handle->dll); //dlclose keeps its own reference count
382 vstfx->handle->dll = 0;
389 vstfx_save_state (VSTState* vstfx, char * filename)
391 FILE* f = g_fopen (filename, "wb");
395 int numParams = vstfx->plugin->numParams;
397 char productString[64];
399 char vendorString[64];
404 fprintf(f, "<plugin_state>\n");
406 success = vstfx_call_dispatcher(vstfx, effGetProductString, 0, 0, productString, 0);
410 fprintf (f, " <check field=\"productString\" value=\"%s\"/>\n", productString);
414 printf ("No product string\n");
417 success = vstfx_call_dispatcher(vstfx, effGetEffectName, 0, 0, effectName, 0);
421 fprintf (f, " <check field=\"effectName\" value=\"%s\"/>\n", effectName);
422 printf ("Effect name: %s\n", effectName);
426 printf ("No effect name\n");
429 success = vstfx_call_dispatcher(vstfx, effGetVendorString, 0, 0, vendorString, 0);
433 fprintf (f, " <check field=\"vendorString\" value=\"%s\"/>\n", vendorString);
434 printf ("Vendor string: %s\n", vendorString);
438 printf ("No vendor string\n");
442 if(vstfx->plugin->flags & 32 )
447 for(i=0; i < numParams; i++)
451 pthread_mutex_lock( &vstfx->lock );
452 val = vstfx->plugin->getParameter(vstfx->plugin, i );
453 pthread_mutex_unlock( &vstfx->lock );
454 fprintf( f, " <param index=\"%d\" value=\"%f\"/>\n", i, val );
457 if(vstfx->plugin->flags & 32 )
459 printf( "getting chunk...\n" );
461 bytelen = vstfx_call_dispatcher(vstfx, 23, 0, 0, &chunk, 0 );
462 printf( "got tha chunk..\n" );
467 printf( "Chunke len < 0 !!! Not saving chunk.\n" );
471 //char *encoded = g_base64_encode( chunk, bytelen );
472 //fprintf( f, " <chunk size=\"%d\">\n %s\n </chunk>\n", bytelen, encoded );
478 fprintf( f, "</plugin_state>\n" );
483 printf ("Could not open state file\n");
489 /*Set up a call to the plugins 'dispatcher' function*/
491 int vstfx_call_dispatcher (VSTState* vstfx, int opcode, int index, int val, void *ptr, float opt)
493 pthread_mutex_lock (&vstfx->lock);
495 /*Set up the opcode and parameters*/
497 vstfx->dispatcher_opcode = opcode;
498 vstfx->dispatcher_index = index;
499 vstfx->dispatcher_val = val;
500 vstfx->dispatcher_ptr = ptr;
501 vstfx->dispatcher_opt = opt;
503 /*Signal that we want the call to happen*/
505 vstfx->dispatcher_wantcall = 1;
507 /*Wait for the call to happen*/
509 pthread_cond_wait (&vstfx->plugin_dispatcher_called, &vstfx->lock);
510 pthread_mutex_unlock (&vstfx->lock);
512 /*Return the result*/
514 return vstfx->dispatcher_retval;